The Smart Controller for my Air 2S takes many hours to charge... overnight or more, instead of the advertised 2 hours. I have done the following:

• Used the charging brick that came with it (part of the Fly More package)
• Swapped that out with the identical-looking charging brick from my Air 2
• Swapped out all USB cables
  

Nothing helps... the problem appears to be in the SC itself. (The drone batteries seem to charge at an acceptable rate.) I have seen this problem cited all over the web. e.g., on Reddit, but have not seen any solutions. Any help, DJi?

Hi, rich. Thank you for reaching out. We are sincerely sorry to read about what happened. Since the issue persists after the troubleshooting steps you have provided, we highly recommend that you send your Smart Controller back to us for further diagnosis. You may submit an online repair request through this link: {https://repair.dji.com/repair/index}. If you need assistance creating a ticket, contact DJI support at (https://www.dji.com/support). Your kind understanding is appreciated and thank you for your continued support.